Title:
光学ガラス及び光学素子
Document Type and Number:
Japanese Patent JP6672472
Kind Code:
B2
Abstract:
The invention provides a high-refraction low-dispersion optical glass with refractive index of 1.76-1.80 and Abbe number of 47-51. The optical glass, comprising the following components by weight percentage: 0-3% of SiO2; 25-40% of B2O3; 20-40% of La2O3; 12-25% of Gd2O3; 6.5-15% of ZrO2; greater than 10% but less than or equal to 20% of ZnO; 0-5% of Ta2O5; 0-5% of Nb2O5; 0-10% of Li2O; less than 0.45 of (Ta2O5+Nb2O5)/(ZnO+Li2O); 0-10% of Y2O3; and below 625° C. of glass transition temperature Tg. With reasonable component ratio, the high-refraction low-dispersion optical glass favorable to precision molding with excellent transmittance can be easily enabled while realizing the required optical constant of the glass of the present invention.
Inventors:
Wave
Application Number:
JP2018544520A
Publication Date:
March 25, 2020
Filing Date:
November 22, 2016
Export Citation:
Assignee:
CHENGDU GUANG MING GUANG DIAN GLASS CO.,LTD.
International Classes:
C03C3/155; C03C3/068; G02B1/00
Domestic Patent References:
| JP2009203083A | ||||
| JP2013525245A | ||||
| JP2015044724A | ||||
| JP2002249337A |
Foreign References:
| WO2014123200A1 | ||||
| CN102923952A |
Attorney, Agent or Firm:
Norihito Yamao
Masaishi Nishishita
Masaishi Nishishita